Dear Simon,

Thank you for your request. This is a putter made out of cast iron and a wooden shaft. The shaft could be highly probably hickory wood. On the metal part is engraved or stamped "Scioto Putter". Probably this is a putter related to the famous Scioto Country Club. This golf club was founded in 1919 and this could fit with a possibly dating in the middle of the 20th century.
An estimation would be between 40 to 80 USD.
This estimation is based on actual recent past recorded auction sales of comparables. Retail "asking prices" can be higher and vary.

With best regards,
Georg